oxtooltipctrl.cpp

随着计算机信息技术的飞速发展

// OXToolTipCtrl.cpp --COXToolTipCtrl Class Implementation
#include "stdafx.h"
#include "OXToolTipCtrl.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

LPCTSTR COXToolTipCtrl::m_szArrowSpace = _T("  ");

/////////////////////////////////////////////////////////////////////////////
// COXToolTipCtrl construction

COXToolTipCtrl::COXToolTipCtrl()
{
	m_pParentWnd		= NULL;
	m_rectMargin		= CRect(2,2,3,3);
	m_nMaxWidth			= 0;
	m_ptOffset			= CPoint(0,20);
	m_pCurrentToolTip	= NULL;
	m_nCheckInterval	= 500;	
	m_nDisplayDelay		= 500;
	m_nDisplayTime		= 5000;
	m_nElapsedTime		= 0;
	m_bActivated		= TRUE;
	m_bTipCancelled		= FALSE;
	m_bHasExtendedText	= FALSE;
	m_hOldFocusWnd		= NULL;
	m_crBackColor		= CLR_DEFAULT;
	m_crTextColor		= CLR_DEFAULT;
	m_bUsingSystemFont	= TRUE;
	m_dwTextStyle		= DT_EXPANDTABS|DT_EXTERNALLEADING|DT_NOPREFIX|DT_WORDBREAK;
    m_arrTools.RemoveAll();
}

COXToolTipCtrl::~COXToolTipCtrl()
{
	COXToolTipInfo* pInfo = NULL;
	int		nSize;
	int		nIndex;
    
	m_Font.DeleteObject();
    nSize = m_arrTools.GetSize();
    for(nIndex = 0; nIndex < nSize; nIndex++)
    {
        pInfo = (COXToolTipInfo *)m_arrTools.GetAt(nIndex);
        delete pInfo;
    }

    m_arrTools.RemoveAll();

    if (IsWindow(m_hWnd))
        DestroyWindow();
}

/////////////////////////////////////////////////////////////////////////////
// COXToolTipCtrl message handlers

BEGIN_MESSAGE_MAP(COXToolTipCtrl, CWnd)
	//{{AFX_MSG_MAP(COXToolTipCtrl)
	ON_WM_PAINT()
	ON_WM_TIMER()
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_WM_SETFOCUS()
	ON_WM_DESTROY()
	ON_WM_SETTINGCHANGE()
	ON_WM_MOUSEACTIVATE()
	//}}AFX_MSG_MAP
    ON_MESSAGE(WM_SETFONT, OnSetFont)
    ON_MESSAGE(WM_GETFONT, OnGetFont)
END_MESSAGE_MAP()

void COXToolTipCtrl::OnPaint() 
{
    if (!m_pCurrentToolTip)
        return;

    CString str = GetTooltipText(m_pCurrentToolTip);
    if (str.IsEmpty())
        return;

	CPaintDC dc(this); // device context for painting

    CRect rect;
    GetClientRect(rect);

    CBrush  Brush, *pOldBrush;
    if (m_pCurrentToolTip->clrBackColor == CLR_DEFAULT)
        Brush.CreateSolidBrush(GetSysColor(COLOR_INFOBK));
    else
        Brush.CreateSolidBrush(m_pCurrentToolTip->clrBackColor);
    pOldBrush = dc.SelectObject(&Brush);

    if (m_pCurrentToolTip->clrTextColor == CLR_DEFAULT)
        dc.SetTextColor(GetSysColor(COLOR_INFOTEXT));
    else
        dc.SetTextColor(m_pCurrentToolTip->clrTextColor);

    CFont *pOldFont = dc.SelectObject(&m_Font);
    
    // Draw Border
    dc.FillRect(&rect, &Brush);
    dc.SelectStockObject(NULL_BRUSH);
    dc.SelectStockObject(BLACK_PEN);
    dc.Rectangle(rect);

    // Draw Text
    dc.SetBkMode(TRANSPARENT);
    rect.DeflateRect(m_rectMargin);

    dc.DrawText(str, rect, m_dwTextStyle);

    if (m_bHasExtendedText)
    {
        TEXTMETRIC tm;
        dc.GetTextMetrics(&tm);
        int nYMargin = max(tm.tmExternalLeading + tm.tmInternalLeading, tm.tmDescent);
        int nXMargin = tm.tmAveCharWidth / 2;

        CSize size = dc.GetTextExtent(m_szArrowSpace);
        if ((size.cy & 1))
            size.cy--;

        CPoint pt[4];
        if (m_bExtended)
        {
            pt[0] = CPoint(rect.left + size.cx - nXMargin, rect.top + nYMargin);
            pt[1] = CPoint(rect.left, rect.top + size.cy/2);
            pt[2] = CPoint(rect.left + size.cx - nXMargin, rect.top + size.cy - nYMargin);
            pt[3] = pt[0];
        }
        else
        {
            pt[0] = CPoint(rect.right - size.cx + nXMargin, rect.top + nYMargin);
            pt[1] = CPoint(rect.right, rect.top + size.cy/2);
            pt[2] = CPoint(rect.right - size.cx + nXMargin, rect.top + size.cy - nYMargin);
            pt[3] = pt[0];
        }
        dc.SelectStockObject(BLACK_BRUSH);
        dc.Polygon(pt, 4);
    }

    // Cleanup
    dc.SelectObject(pOldBrush);
    dc.SelectObject(pOldFont);
}

// --- In